anti-drain back valve

Look at pix please...is it there or in the tranny? Build Sheet info: 1996 Dodge Ram 1500 5.9L V8 MPI Engine NHBP Auxiliary Transmission Oil Cooler DGTS 4-Spd. Automatic 46RE Transmission DHAS Lock-Up Torque Converter ADJ Heavy Duty Service Group AHC Trailer Tow Group AJPP Power Convenience Group